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45 cm2 at discharge and 1.51 cm2, 2 years postoperative, p = 0.01). Conversely, in SAPIEN 3, valve expansion was not seen in the late phase (mean expansion rate, 84.5% at discharge and 83.8%, 2 years postoperative) with a decrease in the aortic valve area (1.41 cm2 at discharge and 1.37 cm2, 2 years postoperative, p = 0.04). The expansion of the middle portion of the LOTUS valves was attributed to the increase in the aortic valve area. In conclusion, this study demonstrated the greater late-phase expansion and better valve performance of mechanically expand